Wiring Diagram AUDI A2 2003 - Battery - ignition/starter switch - multi-function steering wheel control unit - multi-function steering wheel fuse
| A | Battery |
| D | Ignition/starter switch |
| J453 | Multi-function steering wheel control unit |
| S88 | Strip fuse |
| S326 | Multi-function steering wheel fuse |
| 65 | Earth point, left longitudinal member, rear, between B and C pillar |
| 277 | Earth connection -3-, in interior wiring harness |
| 500 | Screw connection -1- (30), on relay plate |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| B156 | Positive (+) connection (30a), in interior wiring harness |
| B163 | Positive (+) connection -1- (15), in interior wiring harness |
| * | As of model year 2003 no longer fitted (phased-in modification) |
| ** | Phased-in modification |
Wiring Diagram AUDI A2 2003 - Operating unit in steering wheel - airbag coil connector/return spring with slip ring - airbag control unit - multi-function steering wheel control unit
| E221 | Operating unit in steering wheel |
| F138 | Airbag coil connector/return spring with slip ring |
| H | Horn plate |
| J4 | Dual tone horn relay |
| J234 | Airbag control unit |
| J453 | Multi-function steering wheel control unit |
| N95 | Airbag igniter, driver's side |
| T3d | 3-pin connector, in steering wheel |
| T5 | 5-pin connector, yellow, in steering wheel |
| T5a | 5-pin connector, yellow, behind steering column switch trim |
| T5b | 5-pin connector, black, behind steering column switch trim |
| 249 | Earth connection -2-, in interior wiring harness |
| 279 | Earth connection -5-, in interior wiring harness |
| Short circuit bridge becomes effective when connector is unplugged. |
Wiring Diagram AUDI A2 2003 - Control unit with display in dash panel insert - multi-function steering wheel control unit
| E1 | Lighting switch |
| J285 | Control unit with display in dash panel insert |
| J453 | Multi-function steering wheel control unit |
| T16 | 16-pin connector, diagnostic connector, black, near fuse box |
| T32a | 32-pin connector, green, on dash panel insert |
| T32b | 32-pin connector, grey, on dash panel insert |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| B145 | Positive (+) connection (58b), in interior wiring harness |
| * | Only applies to models with driver information system |
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